import { type Modifier } from '../nodes/index.js';
import { type ValidationResult } from './helpers.js';
/**
 * Checks whether the value for given `modifier` is valid.
 *
 * @param modifier Modifier AST node.
 * @param valueFormat Value format for the modifier.
 * @param valueFormatFlags Optional; RegExp flags for the value format.
 *
 * @returns Validation result.
 */
export declare const validateValue: (modifier: Modifier, valueFormat: string, valueFormatFlags?: string | null) => ValidationResult;